## #104 kgf to N Error

closed-fixed
nobody
5
2016-04-25
2009-09-04
Anonymous
No

Evaluating an expression in kgf and then converting to N gives an incorrect prefix.

400MPa⋅(pi⋅(88mm)^2/4) to kgf
≈ 248081.59 kgf

then convert to N...
≈ 2.433 kN

If evaluated in N initially the correct answer is given.

400MPa⋅(pi⋅(88mm)^2/4) to N
≈ 2.433 MN

See attached screenshot

## Discussion

• Nobody/Anonymous - 2009-09-04

Screenshot of kgf to N conversion error

• Matteo - 2010-05-27

I cannot reproduce this with latest development branch, even with the same code posted in the bug description.

> 400MPa⋅(pi⋅(88mm)^2/4) to kgf

400 * megapascal * ((pi * ((88 * millimeter)^2)) / 4) = approx. 248081.59 kgf

> 248081.59 kgf to N

248081.59 * kilopond = approx. 2.4328493 MN

> 400MPa⋅(pi⋅(88mm)^2/4) to N

400 * megapascal * ((pi * ((88 * millimeter)^2)) / 4) = approx. 2.4328494 MN

Can someone else try to reproduce this?

• Jonathan Stickel - 2010-06-11

I can reproduce this in 0.9.7:

> 400MPa*pi*(88mm)^2/4 to kgf

(400 * megapascal * pi * ((88 * millimeter)^2)) / 4 = approx. 248081.59 kgf

> to N

248081.59 kgf = approx. 2.4328494 kN

> 400MPa*pi*(88mm)^2/4 to N

(400 * megapascal * pi * ((88 * millimeter)^2)) / 4 = approx. 2.4328494 MN

• Hanna K. - 2016-04-25
• Status: open --> closed-fixed